Synopsis

wint_t towlower_l(wint_t c,locale_t loc);

Description

towlower_l converts an uppercase letter to a corresponding lowercase letter
in locale loc.

If the argument c is a wide character for which iswupper_l is true and there
are one or more corresponding wide characters, in the locale loc, for
which iswlower_l is true, towlower_l returns one (and always the same one for any
given locale) of the corresponding wide characters; otherwise, c is
returned unchanged.